code: def test_action_space(self):
      assert self.vec_env.action_space == self.envs[0].action_space
  
file_path: pfrl/tests/envs_tests/test_vector_envs.py
imports: import gym
  import numpy
  import pytest
  import pfrl
label_desc: Use image node_id 4 for calling the TestSerialVectorEnv obj's underlying member method code with example usage: obj.test_action_space() without return types